Filled with extra power or energy, either literally (an engine with a mechanical boost) or figuratively (made more intense or effective).
From 'super-' (above, extra) plus 'charged' (filled with power or energy). The mechanical term originated in early 1900s automotive engineering, then spread metaphorically.
A supercharger is literally a smaller air pump that crams more air into an engine, letting it burn more fuel—it's one of the few technical engineering terms that became common slang for 'extra powerful' in general!
Complete word intelligence in one call. Free tier — 50 lookups/day.